+ Payne/Hanek argument reduction routine, improves accuracy of generic sin/cos functions over larger argument range. Tested on x86_64-win64 and mipsel-linux.

git-svn-id: http://svn.freepascal.org/svn/fpc/trunk@26115 3ad0048d-3df7-0310-abae-a5850022a9f2